THESE LUMINAIRES ARE MANUFACTURED FOR USE IN HIGH HUMIDITY OR DUSTY ATMOSPHERE.THEY ARE RESISTANT TO MOST CLIMATE CONDITIONS,MARINE ENVIRONMENTS & MAJORITY OF CORROSIVE CHEMICALS( ACID, BASES AND SOLVENTS) HIGHLY RECOMENDED FOR BASEMENT & MULTI-STOREY CARPARKS.SHELTERS,SWIMMING POOLS, HANGAR & ALL INDUSTRIAL PREMISES.